1# Preregistered fixed basket (30 generic grocery items, weekly household reference quantities) — defined BEFORE any2# basket cost was computed (2026-11-01). Items are mapped to matched groups by category and name keywords (regex, FR/EN).3# quantity: in base units (g / ml / un) used to scale unit prices.4items:5 - {id: milk_2pct, category: "Produits laitiers et œufs", name_regex: "lait.*2 ?%|2 ?%.*(lait|milk)|milk.*2 ?%", qty: 4000, base: ml}6 - {id: eggs_12, category: "Produits laitiers et œufs", name_regex: "oeufs|œufs|eggs", qty: 12, base: un}7 - {id: butter_454, category: "Produits laitiers et œufs", name_regex: "beurre|butter", exclude_regex: "arachide|peanut|vegetal|margarine", qty: 454, base: g}8 - {id: cheddar, category: "Charcuteries et fromages", name_regex: "cheddar", qty: 400, base: g}9 - {id: yogurt_plain, category: "Produits laitiers et œufs", name_regex: "yogourt|yogurt", qty: 750, base: g}10 - {id: bread_white, category: "Boulangerie", name_regex: "pain|bread", exclude_regex: "pita|naan|hamburger|hot ?dog|tortilla", qty: 675, base: g}11 - {id: pasta_410, category: "Garde-manger", name_regex: "spaghetti|penne|fusilli|rotini|linguine|macaroni|p[aâ]tes|pasta", exclude_regex: "sauce|fra[iî]ches|frais|gluten", qty: 500, base: g}12 - {id: rice, category: "Garde-manger", name_regex: "\\briz\\b|\\brice\\b", qty: 900, base: g}13 - {id: flour, category: "Garde-manger", name_regex: "farine|flour", qty: 2500, base: g}14 - {id: sugar, category: "Garde-manger", name_regex: "sucre|sugar", exclude_regex: "sans sucre|sugar.?free|zero", qty: 2000, base: g}15 - {id: oil_canola, category: "Garde-manger", name_regex: "huile.*(canola|v[eé]g[eé]tale)|canola oil|vegetable oil", qty: 1000, base: ml}16 - {id: peanut_butter, category: "Garde-manger", name_regex: "beurre d.arachide|peanut butter", qty: 500, base: g}17 - {id: tomato_sauce, category: "Garde-manger", name_regex: "sauce.*(tomate|pizza|spaghetti|pasta)|pasta sauce|tomato sauce", qty: 650, base: ml}18 - {id: canned_tuna, category: "Garde-manger", name_regex: "thon|tuna", qty: 170, base: g}19 - {id: cereal, category: "Garde-manger", name_regex: "c[eé]r[eé]ales|cereal|cheerios|flocons", qty: 500, base: g}20 - {id: coffee_ground, category: "Boissons", name_regex: "caf[eé].*(moulu|ground)|ground coffee", qty: 340, base: g}21 - {id: orange_juice, category: "Boissons", name_regex: "jus d.orange|orange juice", qty: 1750, base: ml}22 - {id: cola_2l, category: "Boissons", name_regex: "cola", exclude_regex: "di[eè]te|diet|z[eé]ro|zero|cerise|cherry|vanille|vanilla", qty: 2000, base: ml}23 - {id: water_24, category: "Boissons", name_regex: "eau.*(source|spring)|spring water|eau.*bouteille", qty: 12000, base: ml}24 - {id: chicken_breast, category: "Viandes et volailles", name_regex: "poitrine.*poulet|chicken breast", qty: 1000, base: g}25 - {id: ground_beef, category: "Viandes et volailles", name_regex: "b(oe|œ)uf hach[eé]|ground beef", qty: 1000, base: g}26 - {id: bacon, category: "Charcuteries et fromages", name_regex: "bacon", exclude_regex: "dinde|turkey|bits|miettes", qty: 375, base: g}27 - {id: salmon, category: "Poissons et fruits de mer", name_regex: "saumon|salmon", qty: 400, base: g}28 - {id: bananas, category: "Fruits et légumes", name_regex: "banane|banana", qty: 1000, base: g}29 - {id: apples, category: "Fruits et légumes", name_regex: "pommes?\\b|apples?\\b", exclude_regex: "jus|juice|compote|terre|potato", qty: 1360, base: g}30 - {id: potatoes, category: "Fruits et légumes", name_regex: "pommes de terre|potatoes", qty: 4540, base: g}31 - {id: onions, category: "Fruits et légumes", name_regex: "oignons?|onions?", qty: 1360, base: g}32 - {id: carrots, category: "Fruits et légumes", name_regex: "carottes?|carrots?", qty: 907, base: g}33 - {id: frozen_veg, category: "Surgelés", name_regex: "l[eé]gumes.*(surgel|m[eé]lang)|mixed vegetables|frozen vegetables", qty: 750, base: g}34 - {id: chips, category: "Collations et confiseries", name_regex: "croustilles|chips", exclude_regex: "tortilla|pita|chocolate|chocolat", qty: 200, base: g}35